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SNAME SPRING MEETING/ STAR SYMPOSIUM Portland, Oregon—May 21-23 The 11th Spring Meeting/STAR (Ship Technology and Research) Symposium of The Society of Naval Architects and Marine Engineers will be held at the Red Lion Inn/ Lloyd Center in Portland, Ore., May 21-23. The theme of this year's sym- posium is "Looking to the 90s." In keeping with this theme, new ideas and challenges of the next decade will be explored in the technical ses- sions featuring 21 papers and two panel discussions. The program is being organized by the host Pacific Northwest Sec- tion of the Society. The Steering Committee is chaired by David Donaldson and the Technical Pro- gram Committee is under Donald Hudson. An entertaining social program will be provided. For early arrivals, a no-host reception with hors d'oeuvres will be held in the Red Lion's Mt. St. Helens Room on Tuesday, May 20, from 6-8 pm. At the President's Reception on May 21 from 6:30 to 8:30, SNAME presi- dent Perry W. Nelson and Mrs. Grace Nelson will greet all regis- trants and guests in the Mt. Maltno- mah Room. The President's Lun- cheon on May 22 will feature a pro- gram of speakers, the presentation of special recognition awards, and an address by Mr. Nelson. The final social event, on May 22 from 6:00 to 10:00 pm, will begin with a salmon bake in a setting over- looking the Willamette River, which flows through the center of Port- land, and conclude with a river cruise aboard a sternwheeler that was designed by a SNAME member of the Pacific Northwest Section. On May 21 the Spouse Program will feature a tour of the City of Portland from 8:45 am to 4:00 pm. This tour is scheduled to visit some of the botanical gardens that are located throughout the city, provid- ing visitors with a good view of why Portland is called the City of Roses. The second tour, on May 22 from 8:30 am to 2:00 pm, is of the Colum- bia River Gorge, providing views of some of the most spectacular scen- ery in the Pacific Northwest. TECHNICAL SESSIONS Wednesday, May 21 Mt. St. Helens Room 9:00 am—"A Simulation Program for Vessel's Maneuvering," by John C. Daidola, Douglas A. Gra- ham, and Donald C. Tolefson This paper discusses the develop- ment and application of a deep- ocean maneuvering simulation pro- gram created for the purpose of comparing the course-keeping and energy-consuming characteristics of a wide range of monohull mining vessel hull forms. Given the external environmental and thrust-produc- ing forces, the program solves the linear equation of motion in the time domain, yielding the forces, displacement, and speed of each hull form. 10:00 am—"Feasibility of Marine Transportation of Municipal Sludge," by Nedret S. Basar and Leon M. Chandras This presentation will outline the development of a Static Simulation Computer Program that was devel- oped to analyze, at feasibility levels, the marine transportation option for moving municipal sludge from a shoreside plant to sea. The resultant program enables coastal municipali- ties to investigate the feasibility of marine surface vessel disposal methods to alternate disposal op- tions. 11:00 am—"Seagoing Hydraulic Hopper Dredges—the Last 60 Years, the Next 15 Years," by Alan M. Woolley This paper outlines the develop- ment of seagoing trailing suction hopper dredges over the past 60 years, describes some current de- signs, and predicts the apparent di- rection in which these vessels are developing. Improvements in major dredging equipment, propulsion systems, and control systems are described. Also discussed are the impact of environmental con- straints, reducing manning, and new dredging requirements. 2:00 pm—Fishing Vessel Dynam- ics and Stability," by Bruce H. Adee, Feng-I Chen, Patrick Eberhardt, and David Winan- dy The authors illustrate results from tests conducted in the natural wind-driven wave environment us- ing a mobile wave-measuring plat- form, constructed in the form of a miniature semisubmersible drilling platform. Time series, wave direc- tional spectra, vessel response spec- tra, and attempts at generating re- sponsive amplitude operators are discussed. 3:00 pm—Panel Discussion: "Im- proved Shipyard Productivity— Zone Operation" 4:30 pm—Panel Discussion: "Ob- taining and Administrating Future U.S. Navy Shipbuilding and Repair Contracts" Moderator: Jack L. Wilskey Panelists: James Beall, Michael J. Franz, and Jerry McMurry Mt. Bachelor Room 9:00 am—"Ship Motions and Sta- bility in Transverse and Longitudi- nal Seaways," by A. Allievi, S.M. Calisal, and F. Namiranian Motions and capsizing of fishing vessels are investigated experimen- tally for transverse and longitudinal seaways, involving a North Atlantic deepsea stern trawler and a typical West Coast fishing vessel. Values of heave, roll, and pitch are measured utilizing a computer-controlled wavemaker at a 220-foot-long model basin. 10:00 am—"Ship Stability Safety in Waves," by Andrew Zborow- ski This paper outlines scientifically based methodology for evaluation of ship intact stability in waves. The methodology is based on considera- tion of static stability, dynamic ef- fects on static stability, and rolling motion. It assesses the contribution of the methodology and resulting procedure for stability relative to future proposals regarding ship sta- bility standards in waves. 11:00 am—"A Numerical Method of Simulation Three-Dimensional Sloshing," by Jeffrey T. Dil- lingham This paper describes the prob- lem-solving of water sloshing using a three-dimensional method versus the previously used two-dimen- sional method. This method is ex- pected to have application in the prediction of the effect of green water on the decks of jackup rigs, heavy-lift vessels, and semisubmer- sible drilling vessels at the transi- tion draft where the lower hulls are barely awash. 2:00 pm—"Changes Within the U.S. Coast Guard Commercial Ves- sel Safety Technical Organization," by Gordon Piche and John Veentjer This paper discusses the initiative taken by the USCG in the commer- cial vessel safety program within the past four to five years, and the resultant success in reducing the manpower intensiveness in this pro- gram. The area of technical reviews, where initiatives have shifted some of the workload to third parties, thus reducing former backlogs, is also discussed. Thursday, May 22 Mt. St. Helens Room 9:00 am—"Deep Ocean Mining: A Technology Developed in the 1970s for Use in the 1990s," by Raymond Kaufman, John P. Latimer, and Donald C. Tolefson This paper presents a general overview of the technology required for successful commercial mining of the deep-ocean manganese, hard mineral module. System discussions will center about ship proportions, maneuverability, propulsion sys- tems for course-keeping, and sys- tems required to support the mining operation such as pipe-handling, main hoists, gimbal structures, and the bending movements involved in the mining operation. 10:00 am—"Damage Criteria for Ship Plating Subjected to Wave Im- pact Forces," by Christopher J. Wiernicki This paper presents a simple, yet rational analytical method of assess- ing the damage of an entire stiff- ened ship panel due to hydrody- namic impact forces. The criteria of ultimate failure of the panel will be formulated to include the plastic collapse and fracture of both the secondary and tertiary structures. A comprehensive casualty damage survey of ship structural failures will be presented in order to identify meaningful extreme loading trends, and to assess the possibility of mini- mizing these failures without com- plicating the engineering effort. SNAME SPRING MEETING PROGRAM AT-A-GLANCE Tuesday, May 20 4:00-8:00 pm—Registration, out- side Cascade Ballroom 6:00-8:00 pm—Mt. St. Helens Room Wednesday, May 21 8:00 am-6:00 pm—Registration 8:45 am-4:00 pm—Portland City Tour 9:00 am-Noon—Technical Ses- sions Noon-2:00 pm—Lunch Break 2:00-6:00 pm—Technical Ses- sions 6:39-8:30 pm—President's Recep- tion, Mt. Maltonomah/Mt. Hollo- day Rooms Thursday, May 22 8:00 am-6:00 pm—Registration 8:30 am-2:00 pm—Columbia Riv- er Gorge Tour 9:00 am-Noon—Technical Ses- sions 12:15-2:00 pm—President's Lun- cheon 2:00-4:00 pm—Technical Ses- sions 6:00-10:00 pm—Salmon Bake/ River Cruise Friday, May 23 8:00-11:00 am—Registration 9:00-11:30 am—Technical Ses- sion 8 Maritime Reporter/Engineering News
